Abstract: During the implementation of data monitoring in the hydrological industry, data sharing system platforms are often required to provide support to better collect, sort, utilize and store hydrological information data, and facilitate better follow-up work in hydrology. In view of this, this article mainly conducts in-depth research and discussion on the design of the hydrological information data sharing system based on the big data platform, and hopes to provide valuable guidance or reference for more technical experts and scholars in the practical research of such topics.